CN110401086B - Forming method of electric connection plug connector - Google Patents
Forming method of electric connection plug connector Download PDFInfo
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- CN110401086B CN110401086B CN201910672140.6A CN201910672140A CN110401086B CN 110401086 B CN110401086 B CN 110401086B CN 201910672140 A CN201910672140 A CN 201910672140A CN 110401086 B CN110401086 B CN 110401086B
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- electric heating
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
- H01R43/20—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for assembling or disassembling contact members with insulating base, case or sleeve
- H01R43/205—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for assembling or disassembling contact members with insulating base, case or sleeve with a panel or printed circuit board
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Connector Housings Or Holding Contact Members (AREA)
- Manufacturing Of Electrical Connectors (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
The technical problem to be solved by the invention is to provide a method for forming an electric connection plug connector, which comprises the following steps of firstly, stripping a section of rubber sheath at the wire connecting end, inserting the rubber sheath into a jack of an electronic component, and welding and fixing the rubber sheath; fixing the electronic component and the plug on the PCB substrate to form a preformed whole; step three, integrally placing the preformed whole and the connecting end of the wire rod into an inner cavity of a forming die; and step four, injecting a liquid plastic material into the inner cavity of the forming mold, and ensuring that the initial temperature of the liquid plastic material is not lower than 200 ℃ and the injection pressure is not higher than 0.5 Mpa. The liquid plastic body wraps the connecting end of the wire rod and the whole preformed unit at the same time until a solid plastic body is formed, so that the final forming of the electric connection plug connector is realized. Therefore, the electronic components are prevented from being damaged by high pressure in the injection molding process, and the final forming quality of the electric connection plug connector is ensured.
Description
Technical Field
The invention relates to the technical field of electric element manufacturing, in particular to a forming method of an electric connection plug connector.
Background
With the progress of science and technology, the electric connection plug connector becomes an essential component in electronic equipment and is widely applied to electronic engineering construction, so that current flows, and the preset function of a circuit is realized. In the forming process of the electric connection plug connector, firstly, an electronic component (a capacitor or a resistor), a plug and a PCB substrate are assembled into a whole, and then, the whole injection molding mode is adopted for forming. In the prior art, the temperature of the plastic material is usually controlled between 155 ℃ and 180 ℃, and in order to ensure that the molding cavity of the molding die is sufficiently filled with the plastic material and the electrically-connected plug connector has good surface quality, the injection pressure of the plastic material needs to be controlled, and is generally 3-5 MPa. However, under the action of the high pressure, the electronic components inevitably have pressure loss, so that the reliability and stability of electric and signal transmission are affected. Thus, a skilled person is urgently needed to solve the above problems.
Disclosure of Invention
The invention aims to solve the technical problem of providing a method for forming an electric connection plug connector, which comprises the following steps:
step one, stripping a section of rubber sheath at the wire connecting end, inserting each branch wire into a jack of an electronic component, and welding and fixing;
fixing the electronic component and the plug on the PCB substrate to form a preformed whole;
placing the pre-formed whole and the connecting end of the wire rod to an inner cavity of a forming die;
and step four, injecting the liquid plastic material into the inner cavity of the forming mold by means of an injection molding machine, and ensuring that the initial temperature of the liquid plastic material is not lower than 200 ℃ and the injection pressure is not higher than 0.5 Mpa. The liquid plastic body wraps the connecting end of the wire rod and the whole preformed unit at the same time until a solid plastic body is formed, so that the final forming of the electric connection plug connector is realized.
As a further improvement of the technical scheme, the initial temperature of the liquid plastic material is controlled at 215-250 ℃, and the injection pressure is controlled at 0.3-0.4 MPa.
As a further improvement of the technical scheme, 6208S low-pressure injection molding material is adopted for the plastic material.
As a further improvement of the technical proposal, the depth of the unpeeled rubber sheath extending into the solid plastic body is not less than 5 mm.
As a further improvement of the above technical solution, an electric heating portion is disposed in the forming mold at a position close to the wire connecting end. Before liquid plastic material is not injected into the inner cavity of the forming mold, the rubber sheath and the inner cavity of the surrounding forming mold are heated by the electric heating part, and the preheating limit temperature is controlled at 80 ℃.
As a further improvement of the technical scheme, a micro wireless temperature measuring chip is arranged close to the connecting end placing position of the wire rod, and the distance between the temperature measuring end and the forming die cavity is 1-3 mm. In addition, a temperature display matched with the micro wireless temperature measuring chip is arranged.
As a further improvement of the above technical solution, a controller is additionally provided, and the controller is simultaneously connected with the temperature display and the electric heating part. When the temperature of the temperature display reaches a preset standard value, the controller generates a stop command to the electric heating part.
As a further improvement of the above technical solution, the electric heating part includes a series of electric heating pipes, and correspondingly, slots adapted to the electric heating pipes are provided on the side wall of the forming mold. And heat-conducting glue is filled in the gap between the electric heating pipe and the slot.
As a further improvement of the technical scheme, a plurality of cooling water channels are further arranged in the forming die and are all arranged along the cavity of the forming die.
Compared with the traditional method for forming the electrically-connected plug connector, in the technical scheme disclosed by the invention, the solid plastic body is formed by adopting a high-temperature low-pressure injection molding mode (namely, the temperature of the liquid plastic material is increased, and the injection pressure is reduced), so that on one hand, the full filling of a forming mold cavity is effectively ensured; on the other hand, the pressure loss of the electronic components caused by high pressure in the injection molding process is avoided, so that the final forming quality of the electric connection plug connector is ensured, and the reliability and the stability of electric or signal transmission are ensured.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a perspective view of the electrical connector of the present invention;
FIG. 2 is a perspective view of the electrical connector of the present invention;
FIG. 3 is a perspective view of the electrical connector of the present invention (with the solid plastic removed);
1-wire rod; 11-a rubber sheath; 2-electronic components; 3-a plug; 4-a PCB substrate; 5-solid plastic body.
Detailed Description
In the description of the present invention, it is to be understood that the terms "front", "back", and the like, indicate orientations or positional relationships based on those shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
In the following, the content of the present invention is further described in detail with reference to specific embodiments, fig. 1 and fig. 2 respectively show a schematic perspective view and a perspective view of an electrical connection plug connector in the present invention, which mainly include a wire 1, an electronic component 2, a plug 3, a PCB substrate 4 and a solid plastic body 5, wherein the wire 1 is inserted and fixed right behind the electronic component 2 (as shown in fig. 3), and the solid plastic body 5 wraps the wire 1, the electronic component 2, the plug 3 and the PCB substrate 4 at the same time.
In order to ensure the complete filling of the cavity of the forming mold and the final forming quality of the electrical connector, it is common practice to increase the injection pressure during the actual production. For a long time, when the transmission performance of the electrical connection plug connector is abnormal after being formed, the problem is generally classified as the quality problem of electronic components, and the problem is reduced through a quality control mode, so that the concept is helpful. Therefore, the invention discloses a method for forming an electric connection plug connector, which comprises the following steps:
firstly, stripping a section of rubber sheath 11 at the connecting end of a wire 1, inserting each branch into a jack of an electronic component 2, and welding and fixing;
step two, welding and fixing the electronic component 2 and the plug 3 on the PCB substrate 4 to form a preformed whole;
placing the pre-formed whole and the connecting end of the wire rod 1 to an inner cavity of a forming die;
and step four, injecting the liquid plastic material into the inner cavity of the forming mold by means of an injection molding machine, and ensuring that the initial temperature of the liquid plastic material is not lower than 200 ℃ and the injection pressure is not higher than 0.5 Mpa. The liquid plastic body wraps the connecting end of the wire 1 and the whole preformed body at the same time until a solid plastic body 5 is formed, so that the final forming of the electric connection plug connector is realized.
Compared with the traditional method for forming the electric connection plug connector, in the technical scheme disclosed by the invention, the solid plastic body 5 is formed by adopting a high-temperature low-pressure injection molding mode, so that the pressure loss of the electronic component 2 caused by high pressure in the injection molding process is avoided, the final forming quality of the electric connection plug connector is ensured, and the reliability and the stability of electricity or signal transmission are ensured. In addition, on one hand, the solid plastic body 5 formed by casting forms a stable and reliable waterproof part at the joint of the wire 1 and the electronic component 2, so that the wire 1 is effectively prevented from being immersed into the electric connection plug connector, on the other hand, the solid plastic body 5 also serves as a connection reinforcing part, and one end of the solid plastic body is always connected with the rubber sheath 11 of the wire 1, so that the pulling force applied to the wire 1 is mainly borne by the rubber sheath 11 in the actual use process, the phenomenon that welding spots crack on each branch line is avoided, and the reliability of connection of the wire 1 is ensured.
Generally speaking, the initial temperature of the liquid plastic material is preferably controlled at 215-250 ℃, and the injection pressure is correspondingly controlled at 0.3-0.4Mpa, so as to meet the requirement of filling the cavity of the forming mold, avoid the electronic component 2 from being damaged by pressure, and ensure the final forming quality of the electrically connected connector. Through long-term experimental demonstration, the plastic material is preferably 6208S low-pressure injection plastic material.
In addition, in order to ensure the connection reliability of the wire 1, the length of the wire rubber sheath 11 and the solid plastic body 5 needs to be controlled, and generally, the depth of the un-peeled rubber sheath 11 extending into the solid plastic body 5 is not smaller than 5 mm.
The material of the rubber sheath 11 is preferably thermoplastic polyurethane elastomer rubber. The thermoplastic polyurethane elastomer rubber and 6208S low-pressure injection molding compound have excellent high-temperature fusion, and the thermoplastic polyurethane elastomer rubber has excellent comprehensive properties of high strength, high toughness, wear resistance, oil resistance and the like, and the glass transition temperature of the thermoplastic polyurethane elastomer rubber is 100.6-122.8 ℃. The 6208S low-pressure injection molding rubber has higher impact resistance and dissolution resistance, and the melting temperature of the rubber is slightly higher than that of thermoplastic polyurethane elastomer rubber. Therefore, in the actual forming process of the electric connection plug connector, the rubber sheath 11 can be melted by means of the waste heat of the molten plastic material, so that the two are melted into a whole, the application of forming auxiliary heating equipment is reduced, and the forming cost of the electric connection plug connector is reduced.
Of course, according to different process requirements and specific conditions, an electric heating portion (not shown in the figure) may be disposed inside the forming mold at a position close to the connecting end of the wire 1. Before liquid plastic material is not injected into the inner cavity of the forming mold, the rubber sheath 11 and the inner cavity of the surrounding forming mold are heated by the electric heating part, so that on one hand, the melting uniformity of the rubber sheath 11 is improved, and the good combination of the rubber sheath and the plastic material is ensured; on the other hand, the heat absorption effect of the side wall of the die cavity in the connecting transition part area of the wire 1 and the electronic component 2 is effectively reduced, the molten plastic material is fully filled at the side wall, and the surface quality of the molded solid plastic body is ensured. Generally, the above-mentioned preheating limit temperature is preferably controlled to 80 ℃.
In addition, as a further optimization of the technical scheme, a micro wireless temperature measuring chip (not shown in the figure) can be arranged close to the connecting end of the wire rod 1, and the distance between the temperature measuring end and the cavity of the forming die is 1-3 mm. In addition, a temperature display (not shown) is provided to match with the micro wireless temperature measurement chip. Therefore, an operator can know the temperature of the mold cavity at the connecting transition position more visually in real time, and the accuracy of the preheating temperature is ensured. Of course, an intelligent temperature control system can be added, and specific embodiments can be made by referring to the following steps: a controller (not shown) is provided at one side of the molding die and is connected to both the temperature indicator and the electric heating unit. When the temperature of the temperature display reaches a preset standard value (for example, 80 ℃), the controller generates a stop command to the electric heating part, so that the phenomenon that the temperature of the rubber sheath 11 is too high is effectively avoided, the phenomenon that the molten plastic material is melted before entering is prevented, the integrity of the final molding form of the rubber sheath 11 is ensured, and the bonding strength with the solid plastic body 5 is ensured.
As a further refinement of the heating portion structure, the heating portion structure comprises a series of electric heating pipes, and correspondingly, slots matched with the electric heating pipes are arranged on the side wall of the forming die. The gap between the electric heating tube and the slot is filled with heat-conducting glue (not shown in the figure). It should be noted that the existence of the heat-conducting glue can greatly improve the heat exchange efficiency between the electric heating tube and the forming mold, and ensure the preheating temperature rise speed of the forming mold and the rubber sheath.
Finally, a plurality of cooling water channels can be further arranged inside the forming mold, and all the cooling water channels run and are arranged along the cavity of the forming mold (not shown in the figure). In the actual operation process, after the solid plastic body 5 is molded, cooling water is immediately filled into the cooling water channel, so that the time spent on cooling the solid plastic body 5 is greatly reduced, and the thermal molding efficiency of the electric connection plug connector is greatly improved.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (2)
1. A method for forming an electrically connected connector, comprising the steps of:
step one, stripping a section of rubber sheath at the wire connecting end, inserting each branch wire into a jack of an electronic component, and welding and fixing;
fixing the electronic component and the plug on the PCB substrate to form a preformed whole;
placing the pre-formed whole and the connecting end of the wire rod to an inner cavity of a forming die;
injecting a liquid plastic material into the inner cavity of the forming mold by means of an injection molding machine, and ensuring that the initial temperature of the liquid plastic material is not lower than 200 ℃ and the injection pressure is not higher than 0.5 Mpa; the liquid plastic material wraps the connecting end of the wire rod and the whole preformed whole body at the same time until a solid plastic body is formed, so that the final forming of the electric connection plug connector is realized;
the initial temperature of the liquid plastic material is controlled to be 215-250 ℃, and the injection pressure is controlled to be 0.3-0.4 MPa;
the plastic material is 6208S low-pressure injection plastic material;
the depth of the unpeeled rubber sheath extending into the solid plastic body is not less than 5 mm; in the actual forming process of the electric connection plug connector, the rubber sheath can be melted by means of the residual heat of the molten plastic material, so that the rubber sheath and the solid plastic body are melted into a whole;
an electric heating part is arranged in the forming die and close to a placement position of the wire connecting end; before liquid plastic materials are not injected into the inner cavity of the forming mold, the rubber sheath and the inner cavity of the forming mold around the rubber sheath are heated by the electric heating part, and the preheating limit temperature is controlled at 80 ℃;
the electric heating part comprises a series of electric heating pipes, and correspondingly, slots matched with the electric heating pipes are arranged on the side wall of the forming die; heat-conducting glue is filled in the gap between the electric heating pipe and the slot;
a plurality of cooling water channels are also arranged in the forming die and are all arranged along the direction of a cavity of the forming die;
a micro wireless temperature measuring chip is arranged close to the connecting end placement position of the wire, and the distance between the temperature measuring end and the forming die cavity is 1-3 mm; in addition, a temperature display matched with the micro wireless temperature measuring chip is arranged.
2. The method of claim 1, wherein a controller is provided to simultaneously connect the temperature indicator and the electric heating unit; when the temperature of the temperature display reaches a preset standard value, the controller generates a stop command to the electric heating part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910672140.6A CN110401086B (en) | 2019-07-24 | 2019-07-24 | Forming method of electric connection plug connector |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910672140.6A CN110401086B (en) | 2019-07-24 | 2019-07-24 | Forming method of electric connection plug connector |
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| CN110401086A CN110401086A (en) | 2019-11-01 |
| CN110401086B true CN110401086B (en) | 2021-08-20 |
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| CN201910672140.6A Active CN110401086B (en) | 2019-07-24 | 2019-07-24 | Forming method of electric connection plug connector |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101483289B (en) * | 2009-02-17 | 2011-03-23 | 信音电子(中国)股份有限公司 | Assembling method for DC electric connector and DC electric connector |
| CN203554840U (en) * | 2012-08-09 | 2014-04-16 | 罗天成 | Novel potting electronic product |
| CN202798298U (en) * | 2012-09-25 | 2013-03-13 | 合肥凯邦电机有限公司 | Wire outlet sheath |
| US8851905B2 (en) * | 2012-11-13 | 2014-10-07 | Airborn, Inc. | Field-replaceable printed circuit board cable assembly and method of use |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1012347A (en) * | 1996-06-21 | 1998-01-16 | Waka Seisakusho:Kk | Connector and its manufacture |
| CN101256545A (en) * | 2007-03-02 | 2008-09-03 | 富士康(昆山)电脑接插件有限公司 | Cable connector assembly |
| CN202495621U (en) * | 2012-01-10 | 2012-10-17 | 东莞市泰康电子科技有限公司 | Rotation angle type cable electric connector joint |
| CN103660129A (en) * | 2012-09-12 | 2014-03-26 | 东莞市铭基电子有限公司 | Low-pressure injection molding method |
| CN203267140U (en) * | 2013-04-22 | 2013-11-06 | 王金 | Injection molding machine |
| CN107364064A (en) * | 2017-07-11 | 2017-11-21 | 湖北三江航天万峰科技发展有限公司 | A kind of cable plug afterbody reinforcement protection method and product |
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| CN110401086A (en) | 2019-11-01 |
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